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/*
* Software async crypto daemon.
*
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
*
* Added AEAD support to cryptd.
* Authors: Tadeusz Struk (tadeusz.struk@intel.com)
* Adrian Hoban <adrian.hoban@intel.com>
* Gabriele Paoloni <gabriele.paoloni@intel.com>
* Aidan O'Mahony (aidan.o.mahony@intel.com)
* Copyright (c) 2010, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include
<crypto/algapi.h>
#include
<crypto/internal/hash.h>
#include
<crypto/internal/aead.h>
#include
<crypto/cryptd.h>
#include
<crypto/crypto_wq.h>
#include
<linux/err.h>
#include
<linux/init.h>
#include
<linux/kernel.h>
#include
<linux/list.h>
#include
<linux/module.h>
#include
<linux/scatterlist.h>
#include
<linux/sched.h>
#include
<linux/slab.h>
#define
CRYPTD_MAX_CPU_QLEN
100
struct
cryptd_cpu_queue
{
struct
crypto_queue
queue
;
struct
work_struct
work
;
};
struct
cryptd_queue
{
struct
cryptd_cpu_queue
__percpu
*
cpu_queue
;
};
struct
cryptd_instance_ctx
{
struct
crypto_spawn
spawn
;
struct
cryptd_queue
*
queue
;
};
struct
hashd_instance_ctx
{
struct
crypto_shash_spawn
spawn
;
struct
cryptd_queue
*
queue
;
};
struct
aead_instance_ctx
{
struct
crypto_aead_spawn
aead_spawn
;
struct
cryptd_queue
*
queue
;
};
struct
cryptd_blkcipher_ctx
{
struct
crypto_blkcipher
*
child
;
};
struct
cryptd_blkcipher_request_ctx
{
crypto_completion_t
complete
;
};
struct
cryptd_hash_ctx
{
struct
crypto_shash
*
child
;
};
struct
cryptd_hash_request_ctx
{
crypto_completion_t
complete
;
struct
shash_desc
desc
;
};
struct
cryptd_aead_ctx
{
struct
crypto_aead
*
child
;
};
struct
cryptd_aead_request_ctx
{
crypto_completion_t
complete
;
};
static
void
cryptd_queue_worker
(
struct
work_struct
*
work
);
static
int
cryptd_init_queue
(
struct
cryptd_queue
*
queue
,
unsigned
int
max_cpu_qlen
)
{
int
cpu
;
struct
cryptd_cpu_queue
*
cpu_queue
;
queue
->
cpu_queue
=
alloc_percpu
(
struct
cryptd_cpu_queue
);
if
(!
queue
->
cpu_queue
)
return
-
ENOMEM
;
for_each_possible_cpu
(
cpu
) {
cpu_queue
=
per_cpu_ptr
(
queue
->
cpu_queue
,
cpu
);
crypto_init_queue
(
&
cpu_queue
->
queue
,
max_cpu_qlen
);
INIT_WORK
(
&
cpu_queue
->
work
,
cryptd_queue_worker
);
}
return
0
;
}
static
void
cryptd_fini_queue
(
struct
cryptd_queue
*
queue
)
{
int
cpu
;
struct
cryptd_cpu_queue
*
cpu_queue
;
for_each_possible_cpu
(
cpu
) {
cpu_queue
=
per_cpu_ptr
(
queue
->
cpu_queue
,
cpu
);
BUG_ON
(
cpu_queue
->
queue
.
qlen
);
}
free_percpu
(
queue
->
cpu_queue
);
}
static
int
cryptd_enqueue_request
(
struct
cryptd_queue
*
queue
,
struct
crypto_async_request
*
request
)
{
int
cpu
,
err
;
struct
cryptd_cpu_queue
*
cpu_queue
;
cpu
=
get_cpu
();
cpu_queue
=
this_cpu_ptr
(
queue
->
cpu_queue
);
err
=
crypto_enqueue_request
(
&
cpu_queue
->
queue
,
request
);
queue_work_on
(
cpu
,
kcrypto_wq
,
&
cpu_queue
->
work
);
put_cpu
();
return
err
;
}
/* Called in workqueue context, do one real cryption work (via
* req->complete) and reschedule itself if there are more work to
* do. */
static
void
cryptd_queue_worker
(
struct
work_struct
*
work
)
{
struct
cryptd_cpu_queue
*
cpu_queue
;
struct
crypto_async_request
*
req
,
*
backlog
;
cpu_queue
=
container_of
(
work
,
struct
cryptd_cpu_queue
,
work
);
/* Only handle one request at a time to avoid hogging crypto
* workqueue. preempt_disable/enable is used to prevent
* being preempted by cryptd_enqueue_request() */
preempt_disable
();
backlog
=
crypto_get_backlog
(
&
cpu_queue
->
queue
);
req
=
crypto_dequeue_request
(
&
cpu_queue
->
queue
);
preempt_enable
();
if
(!
req
)
return
;
if
(
backlog
)
backlog
->
complete
(
backlog
,
-
EINPROGRESS
);
req
->
complete
(
req
,
0
);
if
(
cpu_queue
->
queue
.
qlen
)
queue_work
(
kcrypto_wq
,
&
cpu_queue
->
work
);
}
static
inline
struct
cryptd_queue
*
cryptd_get_queue
(
struct
crypto_tfm
*
tfm
)
{
struct
crypto_instance
*
inst
=
crypto_tfm_alg_instance
(
tfm
);
struct
cryptd_instance_ctx
*
ictx
=
crypto_instance_ctx
(
inst
);
return
ictx
->
queue
;
}
static
int
cryptd_blkcipher_setkey
(
struct
crypto_ablkcipher
*
parent
,
const
u8
*
key
,
unsigned
int
keylen
)
{
struct
cryptd_blkcipher_ctx
*
ctx
=
crypto_ablkcipher_ctx
(
parent
);
struct
crypto_blkcipher
*
child
=
ctx
->
child
;
int
err
;
crypto_blkcipher_clear_flags
(
child
,
CRYPTO_TFM_REQ_MASK
);
crypto_blkcipher_set_flags
(
child
,
crypto_ablkcipher_get_flags
(
parent
)
&
CRYPTO_TFM_REQ_MASK
);
err
=
crypto_blkcipher_setkey
(
child
,
key
,
keylen
);
crypto_ablkcipher_set_flags
(
parent
,
crypto_blkcipher_get_flags
(
child
)
&
CRYPTO_TFM_RES_MASK
);
return
err
;
}
static
void
cryptd_blkcipher_crypt
(
struct
ablkcipher_request
*
req
,
struct
crypto_blkcipher
*
child
,
int
err
,
int
(
*
crypt
)(
struct
blkcipher_desc
*
desc
,
struct
scatterlist
*
dst
,
struct
scatterlist
*
src
,
unsigned
int
len
))
{
struct
cryptd_blkcipher_request_ctx
*
rctx
;
struct
blkcipher_desc
desc
;
rctx
=
ablkcipher_request_ctx
(
req
);
if
(
unlikely
(
err
==
-
EINPROGRESS
))
goto
out
;
desc
.
tfm
=
child
;
desc
.
info
=
req
->
info
;
desc
.
flags
=
CRYPTO_TFM_REQ_MAY_SLEEP
;
err
=
crypt
(
&
desc
,
req
->
dst
,
req
->
src
,
req
->
nbytes
);
req
->
base
.
complete
=
rctx
->
complete
;
out
:
local_bh_disable
();
rctx
->
complete
(
&
req
->
base
,
err
);
local_bh_enable
();
}
static
void
cryptd_blkcipher_encrypt
(
struct
crypto_async_request
*
req
,
int
err
)
{
struct
cryptd_blkcipher_ctx
*
ctx
=
crypto_tfm_ctx
(
req
->
tfm
);
struct
crypto_blkcipher
*
child
=
ctx
->
child
;
cryptd_blkcipher_crypt
(
ablkcipher_request_cast
(
req
),
child
,
err
,
crypto_blkcipher_crt
(
child
)
->
encrypt
);
}
static
void
cryptd_blkcipher_decrypt
(
struct
crypto_async_request
*
req
,
int
err
)
{
struct
cryptd_blkcipher_ctx
*
ctx
=
crypto_tfm_ctx
(
req
->
tfm
);
struct
crypto_blkcipher
*
child
=
ctx
->
child
;
cryptd_blkcipher_crypt
(
ablkcipher_request_cast
(
req
),
child
,
err
,
crypto_blkcipher_crt
(
child
)
->
decrypt
);
}
static
int
cryptd_blkcipher_enqueue
(
struct
ablkcipher_request
*
req
,
crypto_completion_t
complete
)
{
struct
cryptd_blkcipher_request_ctx
*
rctx
=
ablkcipher_request_ctx
(
req
);
struct
crypto_ablkcipher
*
tfm
=
crypto_ablkcipher_reqtfm
(
req
);
struct
cryptd_queue
*
queue
;
queue
=
cryptd_get_queue
(
crypto_ablkcipher_tfm
(
tfm
));
rctx
->
complete
=
req
->
base
.
complete
;
req
->
base
.
complete
=
complete
;
return
cryptd_enqueue_request
(
queue
,
&
req
->
base
);
}
static
int
cryptd_blkcipher_encrypt_enqueue
(
struct
ablkcipher_request
*
req
)
{
return
cryptd_blkcipher_enqueue
(
req
,
cryptd_blkcipher_encrypt
);
}
static
int
cryptd_blkcipher_decrypt_enqueue
(
struct
ablkcipher_request
*
req
)
{
return
cryptd_blkcipher_enqueue
(
req
,
cryptd_blkcipher_decrypt
);
}
static
int
cryptd_blkcipher_init_tfm
(
struct
crypto_tfm
*
tfm
)
{
struct
crypto_instance
*
inst
=
crypto_tfm_alg_instance
(
tfm
);
struct
cryptd_instance_ctx
*
ictx
=
crypto_instance_ctx
(
inst
);
struct
crypto_spawn
*
spawn
=
&
ictx
->
spawn
;
struct
cryptd_blkcipher_ctx
*
ctx
=
crypto_tfm_ctx
(
tfm
);
struct
crypto_blkcipher
*
cipher
;
cipher
=
crypto_spawn_blkcipher
(
spawn
);
if
(
IS_ERR
(
cipher
))
return
PTR_ERR
(
cipher
);
ctx
->
child
=
cipher
;
tfm
->
crt_ablkcipher
.
reqsize
=
sizeof
(
struct
cryptd_blkcipher_request_ctx
);
return
0
;
}
static
void
cryptd_blkcipher_exit_tfm
(
struct
crypto_tfm
*
tfm
)
{
struct
cryptd_blkcipher_ctx
*
ctx
=
crypto_tfm_ctx
(
tfm
);
crypto_free_blkcipher
(
ctx
->
child
);
}
static
void
*
cryptd_alloc_instance
(
struct
crypto_alg
*
alg
,
unsigned
int
head
,
unsigned
int
tail
)
{
char
*
p
;
struct
crypto_instance
*
inst
;
int
err
;
p
=
kzalloc
(
head
+
sizeof
(
*
inst
)
+
tail
,
GFP_KERNEL
);
if
(!
p
)
return
ERR_PTR
(
-
ENOMEM
);
inst
=
(
void
*
)(
p
+
head
);
err
=
-
ENAMETOOLONG
;
if
(
snprintf
(
inst
->
alg
.
cra_driver_name
,
CRYPTO_MAX_ALG_NAME
,
"cryptd(%s)"
,
alg
->
cra_driver_name
) >=
CRYPTO_MAX_ALG_NAME
)
goto
out_free_inst
;
memcpy
(
inst
->
alg
.
cra_name
,
alg
->
cra_name
,
CRYPTO_MAX_ALG_NAME
);
inst
->
alg
.
cra_priority
=
alg
->
cra_priority
+
50
;
inst
->
alg
.
cra_blocksize
=
alg
->
cra_blocksize
;
inst
->
alg
.
cra_alignmask
=
alg
->
cra_alignmask
;
out
:
return
p
;
out_free_inst
:
kfree
(
p
);
p
=
ERR_PTR
(
err
);
goto
out
;
}
static
int
cryptd_create_blkcipher
(
struct
crypto_template
*
tmpl
,
struct
rtattr
*
*
tb
,
struct
cryptd_queue
*
queue
)
{
struct
cryptd_instance_ctx
*
ctx
;
struct
crypto_instance
*
inst
;
struct
crypto_alg
*
alg
;
int
err
;
alg
=
crypto_get_attr_alg
(
tb
,
CRYPTO_ALG_TYPE_BLKCIPHER
,
CRYPTO_ALG_TYPE_MASK
);
if
(
IS_ERR
(
alg
))
return
PTR_ERR
(
alg
);
inst
=
cryptd_alloc_instance
(
alg
,
0
,
sizeof
(
*
ctx
));
err
=
PTR_ERR
(
inst
);
if
(
IS_ERR
(
inst
))
goto
out_put_alg
;
ctx
=
crypto_instance_ctx
(
inst
);
ctx
->
queue
=
queue
;
err
=
crypto_init_spawn
(
&
ctx
->
spawn
,
alg
,
inst
,
CRYPTO_ALG_TYPE_MASK
|
CRYPTO_ALG_ASYNC
);
if
(
err
)
goto
out_free_inst
;
inst
->
alg
.
cra_flags
=
CRYPTO_ALG_TYPE_ABLKCIPHER
|
CRYPTO_ALG_ASYNC
;
inst
->
alg
.
cra_type
=
&
crypto_ablkcipher_type
;
inst
->
alg
.
cra_ablkcipher
.
ivsize
=
alg
->
cra_blkcipher
.
ivsize
;
inst
->
alg
.
cra_ablkcipher
.
min_keysize
=
alg
->
cra_blkcipher
.
min_keysize
;
inst
->
alg
.
cra_ablkcipher
.
max_keysize
=
alg
->
cra_blkcipher
.
max_keysize
;
inst
->
alg
.
cra_ablkcipher
.
geniv
=
alg
->
cra_blkcipher
.
geniv
;
inst
->
alg
.
cra_ctxsize
=
sizeof
(
struct
cryptd_blkcipher_ctx
);
inst
->
alg
.
cra_init
=
cryptd_blkcipher_init_tfm
;
inst
->
alg
.
cra_exit
=
cryptd_blkcipher_exit_tfm
;
inst
->
alg
.
cra_ablkcipher
.
setkey
=
cryptd_blkcipher_setkey
;
inst
->
alg
.
cra_ablkcipher
.
encrypt
=
cryptd_blkcipher_encrypt_enqueue
;
inst
->
alg
.
cra_ablkcipher
.
decrypt
=
cryptd_blkcipher_decrypt_enqueue
;
err
=
crypto_register_instance
(
tmpl
,
inst
);
if
(
err
) {
crypto_drop_spawn
(
&
ctx
->
spawn
);
out_free_inst
:
kfree
(
inst
);
}
out_put_alg
:
crypto_mod_put
(
alg
);
return
err
;
}
static
int
cryptd_hash_init_tfm
(
struct
crypto_tfm
*
tfm
)
{
struct
crypto_instance
*
inst
=
crypto_tfm_alg_instance
(
tfm
);
struct
hashd_instance_ctx
*
ictx
=
crypto_instance_ctx
(
inst
);
struct
crypto_shash_spawn
*
spawn
=
&
ictx
->
spawn
;
struct
cryptd_hash_ctx
*
ctx
=
crypto_tfm_ctx
(
tfm
);
struct
crypto_shash
*
hash
;
hash
=
crypto_spawn_shash
(
spawn
);
if
(
IS_ERR
(
hash
))
return
PTR_ERR
(
hash
);
ctx
->
child
=
hash
;
crypto_ahash_set_reqsize
(
__crypto_ahash_cast
(
tfm
),
sizeof
(
struct
cryptd_hash_request_ctx
)
+
crypto_shash_descsize
(
hash
));
return
0
;
}
static
void
cryptd_hash_exit_tfm
(
struct
crypto_tfm
*
tfm
)
{
struct
cryptd_hash_ctx
*
ctx
=
crypto_tfm_ctx
(
tfm
);
crypto_free_shash
(
ctx
->
child
);
}
static
int
cryptd_hash_setkey
(
struct
crypto_ahash
*
parent
,
const
u8
*
key
,
unsigned
int
keylen
)
{
struct
cryptd_hash_ctx
*
ctx
=
crypto_ahash_ctx
(
parent
);
struct
crypto_shash
*
child
=
ctx
->
child
;
int
err
;
crypto_shash_clear_flags
(
child
,
CRYPTO_TFM_REQ_MASK
);
crypto_shash_set_flags
(
child
,
crypto_ahash_get_flags
(
parent
)
&
CRYPTO_TFM_REQ_MASK
);
err
=
crypto_shash_setkey
(
child
,
key
,
keylen
);
crypto_ahash_set_flags
(
parent
,
crypto_shash_get_flags
(
child
)
&
CRYPTO_TFM_RES_MASK
);
return
err
;
}
static
int
cryptd_hash_enqueue
(
struct
ahash_request
*
req
,
crypto_completion_t
complete
)
{
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
struct
crypto_ahash
*
tfm
=
crypto_ahash_reqtfm
(
req
);
struct
cryptd_queue
*
queue
=
cryptd_get_queue
(
crypto_ahash_tfm
(
tfm
));
rctx
->
complete
=
req
->
base
.
complete
;
req
->
base
.
complete
=
complete
;
return
cryptd_enqueue_request
(
queue
,
&
req
->
base
);
}
static
void
cryptd_hash_init
(
struct
crypto_async_request
*
req_async
,
int
err
)
{
struct
cryptd_hash_ctx
*
ctx
=
crypto_tfm_ctx
(
req_async
->
tfm
);
struct
crypto_shash
*
child
=
ctx
->
child
;
struct
ahash_request
*
req
=
ahash_request_cast
(
req_async
);
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
struct
shash_desc
*
desc
=
&
rctx
->
desc
;
if
(
unlikely
(
err
==
-
EINPROGRESS
))
goto
out
;
desc
->
tfm
=
child
;
desc
->
flags
=
CRYPTO_TFM_REQ_MAY_SLEEP
;
err
=
crypto_shash_init
(
desc
);
req
->
base
.
complete
=
rctx
->
complete
;
out
:
local_bh_disable
();
rctx
->
complete
(
&
req
->
base
,
err
);
local_bh_enable
();
}
static
int
cryptd_hash_init_enqueue
(
struct
ahash_request
*
req
)
{
return
cryptd_hash_enqueue
(
req
,
cryptd_hash_init
);
}
static
void
cryptd_hash_update
(
struct
crypto_async_request
*
req_async
,
int
err
)
{
struct
ahash_request
*
req
=
ahash_request_cast
(
req_async
);
struct
cryptd_hash_request_ctx
*
rctx
;
rctx
=
ahash_request_ctx
(
req
);
if
(
unlikely
(
err
==
-
EINPROGRESS
))
goto
out
;
err
=
shash_ahash_update
(
req
,
&
rctx
->
desc
);
req
->
base
.
complete
=
rctx
->
complete
;
out
:
local_bh_disable
();
rctx
->
complete
(
&
req
->
base
,
err
);
local_bh_enable
();
}
static
int
cryptd_hash_update_enqueue
(
struct
ahash_request
*
req
)
{
return
cryptd_hash_enqueue
(
req
,
cryptd_hash_update
);
}
static
void
cryptd_hash_final
(
struct
crypto_async_request
*
req_async
,
int
err
)
{
struct
ahash_request
*
req
=
ahash_request_cast
(
req_async
);
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
if
(
unlikely
(
err
==
-
EINPROGRESS
))
goto
out
;
err
=
crypto_shash_final
(
&
rctx
->
desc
,
req
->
result
);
req
->
base
.
complete
=
rctx
->
complete
;
out
:
local_bh_disable
();
rctx
->
complete
(
&
req
->
base
,
err
);
local_bh_enable
();
}
static
int
cryptd_hash_final_enqueue
(
struct
ahash_request
*
req
)
{
return
cryptd_hash_enqueue
(
req
,
cryptd_hash_final
);
}
static
void
cryptd_hash_finup
(
struct
crypto_async_request
*
req_async
,
int
err
)
{
struct
ahash_request
*
req
=
ahash_request_cast
(
req_async
);
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
if
(
unlikely
(
err
==
-
EINPROGRESS
))
goto
out
;
err
=
shash_ahash_finup
(
req
,
&
rctx
->
desc
);
req
->
base
.
complete
=
rctx
->
complete
;
out
:
local_bh_disable
();
rctx
->
complete
(
&
req
->
base
,
err
);
local_bh_enable
();
}
static
int
cryptd_hash_finup_enqueue
(
struct
ahash_request
*
req
)
{
return
cryptd_hash_enqueue
(
req
,
cryptd_hash_finup
);
}
static
void
cryptd_hash_digest
(
struct
crypto_async_request
*
req_async
,
int
err
)
{
struct
cryptd_hash_ctx
*
ctx
=
crypto_tfm_ctx
(
req_async
->
tfm
);
struct
crypto_shash
*
child
=
ctx
->
child
;
struct
ahash_request
*
req
=
ahash_request_cast
(
req_async
);
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
struct
shash_desc
*
desc
=
&
rctx
->
desc
;
if
(
unlikely
(
err
==
-
EINPROGRESS
))
goto
out
;
desc
->
tfm
=
child
;
desc
->
flags
=
CRYPTO_TFM_REQ_MAY_SLEEP
;
err
=
shash_ahash_digest
(
req
,
desc
);
req
->
base
.
complete
=
rctx
->
complete
;
out
:
local_bh_disable
();
rctx
->
complete
(
&
req
->
base
,
err
);
local_bh_enable
();
}
static
int
cryptd_hash_digest_enqueue
(
struct
ahash_request
*
req
)
{
return
cryptd_hash_enqueue
(
req
,
cryptd_hash_digest
);
}
static
int
cryptd_hash_export
(
struct
ahash_request
*
req
,
void
*
out
)
{
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
return
crypto_shash_export
(
&
rctx
->
desc
,
out
);
}
static
int
cryptd_hash_import
(
struct
ahash_request
*
req
,
const
void
*
in
)
{
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
return
crypto_shash_import
(
&
rctx
->
desc
,
in
);
}
static
int
cryptd_create_hash
(
struct
crypto_template
*
tmpl
,
struct
rtattr
*
*
tb
,
struct
cryptd_queue
*
queue
)
{
struct
hashd_instance_ctx
*
ctx
;
struct
ahash_instance
*
inst
;
struct
shash_alg
*
salg
;
struct
crypto_alg
*
alg
;
int
err
;
salg
=
shash_attr_alg
(
tb
[
1
],
0
,
0
);
if
(
IS_ERR
(
salg
))
return
PTR_ERR
(
salg
);
alg
=
&
salg
->
base
;
inst
=
cryptd_alloc_instance
(
alg
,
ahash_instance_headroom
(),
sizeof
(
*
ctx
));
err
=
PTR_ERR
(
inst
);
if
(
IS_ERR
(
inst
))
goto
out_put_alg
;
ctx
=
ahash_instance_ctx
(
inst
);
ctx
->
queue
=
queue
;
err
=
crypto_init_shash_spawn
(
&
ctx
->
spawn
,
salg
,
ahash_crypto_instance
(
inst
));
if
(
err
)
goto
out_free_inst
;
inst
->
alg
.
halg
.
base
.
cra_flags
=
CRYPTO_ALG_ASYNC
;
inst
->
alg
.
halg
.
digestsize
=
salg
->
digestsize
;
inst
->
alg
.
halg
.
base
.
cra_ctxsize
=
sizeof
(
struct
cryptd_hash_ctx
);
inst
->
alg
.
halg
.
base
.
cra_init
=
cryptd_hash_init_tfm
;
inst
->
alg
.
halg
.
base
.
cra_exit
=
cryptd_hash_exit_tfm
;
inst
->
alg
.
init
=
cryptd_hash_init_enqueue
;
inst
->
alg
.
update
=
cryptd_hash_update_enqueue
;
inst
->
alg
.
final
=
cryptd_hash_final_enqueue
;
inst
->
alg
.
finup
=
cryptd_hash_finup_enqueue
;
inst
->
alg
.
export
=
cryptd_hash_export
;
inst
->
alg
.
import
=
cryptd_hash_import
;
inst
->
alg
.
setkey
=
cryptd_hash_setkey
;
inst
->
alg
.
digest
=
cryptd_hash_digest_enqueue
;
err
=
ahash_register_instance
(
tmpl
,
inst
);
if
(
err
) {
crypto_drop_shash
(
&
ctx
->
spawn
);
out_free_inst
:
kfree
(
inst
);
}
out_put_alg
:
crypto_mod_put
(
alg
);
return
err
;
}
static
void
cryptd_aead_crypt
(
struct
aead_request
*
req
,
struct
crypto_aead
*
child
,
int
err
,
int
(
*
crypt
)(
struct
aead_request
*
req
))
{
struct
cryptd_aead_request_ctx
*
rctx
;
rctx
=
aead_request_ctx
(
req
);
if
(
unlikely
(
err
==
-
EINPROGRESS
))
goto
out
;
aead_request_set_tfm
(
req
,
child
);
err
=
crypt
(
req
);
req
->
base
.
complete
=
rctx
->
complete
;
out
:
local_bh_disable
();
rctx
->
complete
(
&
req
->
base
,
err
);
local_bh_enable
();
}
static
void
cryptd_aead_encrypt
(
struct
crypto_async_request
*
areq
,
int
err
)
{
struct
cryptd_aead_ctx
*
ctx
=
crypto_tfm_ctx
(
areq
->
tfm
);
struct
crypto_aead
*
child
=
ctx
->
child
;
struct
aead_request
*
req
;
req
=
container_of
(
areq
,
struct
aead_request
,
base
);
cryptd_aead_crypt
(
req
,
child
,
err
,
crypto_aead_crt
(
child
)
->
encrypt
);
}
static
void
cryptd_aead_decrypt
(
struct
crypto_async_request
*
areq
,
int
err
)
{
struct
cryptd_aead_ctx
*
ctx
=
crypto_tfm_ctx
(
areq
->
tfm
);
struct
crypto_aead
*
child
=
ctx
->
child
;
struct
aead_request
*
req
;
req
=
container_of
(
areq
,
struct
aead_request
,
base
);
cryptd_aead_crypt
(
req
,
child
,
err
,
crypto_aead_crt
(
child
)
->
decrypt
);
}
static
int
cryptd_aead_enqueue
(
struct
aead_request
*
req
,
crypto_completion_t
complete
)
{
struct
cryptd_aead_request_ctx
*
rctx
=
aead_request_ctx
(
req
);
struct
crypto_aead
*
tfm
=
crypto_aead_reqtfm
(
req
);
struct
cryptd_queue
*
queue
=
cryptd_get_queue
(
crypto_aead_tfm
(
tfm
));
rctx
->
complete
=
req
->
base
.
complete
;
req
->
base
.
complete
=
complete
;
return
cryptd_enqueue_request
(
queue
,
&
req
->
base
);
}
static
int
cryptd_aead_encrypt_enqueue
(
struct
aead_request
*
req
)
{
return
cryptd_aead_enqueue
(
req
,
cryptd_aead_encrypt
);
}
static
int
cryptd_aead_decrypt_enqueue
(
struct
aead_request
*
req
)
{
return
cryptd_aead_enqueue
(
req
,
cryptd_aead_decrypt
);
}
static
int
cryptd_aead_init_tfm
(
struct
crypto_tfm
*
tfm
)
{
struct
crypto_instance
*
inst
=
crypto_tfm_alg_instance
(
tfm
);
struct
aead_instance_ctx
*
ictx
=
crypto_instance_ctx
(
inst
);
struct
crypto_aead_spawn
*
spawn
=
&
ictx
->
aead_spawn
;
struct
cryptd_aead_ctx
*
ctx
=
crypto_tfm_ctx
(
tfm
);
struct
crypto_aead
*
cipher
;
cipher
=
crypto_spawn_aead
(
spawn
);
if
(
IS_ERR
(
cipher
))
return
PTR_ERR
(
cipher
);
crypto_aead_set_flags
(
cipher
,
CRYPTO_TFM_REQ_MAY_SLEEP
);
ctx
->
child
=
cipher
;
tfm
->
crt_aead
.
reqsize
=
sizeof
(
struct
cryptd_aead_request_ctx
);
return
0
;
}
static
void
cryptd_aead_exit_tfm
(
struct
crypto_tfm
*
tfm
)
{
struct
cryptd_aead_ctx
*
ctx
=
crypto_tfm_ctx
(
tfm
);
crypto_free_aead
(
ctx
->
child
);
}
static
int
cryptd_create_aead
(
struct
crypto_template
*
tmpl
,
struct
rtattr
*
*
tb
,
struct
cryptd_queue
*
queue
)
{
struct
aead_instance_ctx
*
ctx
;
struct
crypto_instance
*
inst
;
struct
crypto_alg
*
alg
;
int
err
;
alg
=
crypto_get_attr_alg
(
tb
,
CRYPTO_ALG_TYPE_AEAD
,
CRYPTO_ALG_TYPE_MASK
);
if
(
IS_ERR
(
alg
))
return
PTR_ERR
(
alg
);
inst
=
cryptd_alloc_instance
(
alg
,
0
,
sizeof
(
*
ctx
));
err
=
PTR_ERR
(
inst
);
if
(
IS_ERR
(
inst
))
goto
out_put_alg
;
ctx
=
crypto_instance_ctx
(
inst
);
ctx
->
queue
=
queue
;
err
=
crypto_init_spawn
(
&
ctx
->
aead_spawn
.
base
,
alg
,
inst
,
CRYPTO_ALG_TYPE_MASK
|
CRYPTO_ALG_ASYNC
);
if
(
err
)
goto
out_free_inst
;
inst
->
alg
.
cra_flags
=
CRYPTO_ALG_TYPE_AEAD
|
CRYPTO_ALG_ASYNC
;
inst
->
alg
.
cra_type
=
alg
->
cra_type
;
inst
->
alg
.
cra_ctxsize
=
sizeof
(
struct
cryptd_aead_ctx
);
inst
->
alg
.
cra_init
=
cryptd_aead_init_tfm
;
inst
->
alg
.
cra_exit
=
cryptd_aead_exit_tfm
;
inst
->
alg
.
cra_aead
.
setkey
=
alg
->
cra_aead
.
setkey
;
inst
->
alg
.
cra_aead
.
setauthsize
=
alg
->
cra_aead
.
setauthsize
;
inst
->
alg
.
cra_aead
.
geniv
=
alg
->
cra_aead
.
geniv
;
inst
->
alg
.
cra_aead
.
ivsize
=
alg
->
cra_aead
.
ivsize
;
inst
->
alg
.
cra_aead
.
maxauthsize
=
alg
->
cra_aead
.
maxauthsize
;
inst
->
alg
.
cra_aead
.
encrypt
=
cryptd_aead_encrypt_enqueue
;
inst
->
alg
.
cra_aead
.
decrypt
=
cryptd_aead_decrypt_enqueue
;
inst
->
alg
.
cra_aead
.
givencrypt
=
alg
->
cra_aead
.
givencrypt
;
inst
->
alg
.
cra_aead
.
givdecrypt
=
alg
->
cra_aead
.
givdecrypt
;
err
=
crypto_register_instance
(
tmpl
,
inst
);
if
(
err
) {
crypto_drop_spawn
(
&
ctx
->
aead_spawn
.
base
);
out_free_inst
:
kfree
(
inst
);
}
out_put_alg
:
crypto_mod_put
(
alg
);
return
err
;
}
static
struct
cryptd_queue
queue
;
static
int
cryptd_create
(
struct
crypto_template
*
tmpl
,
struct
rtattr
*
*
tb
)
{
struct
crypto_attr_type
*
algt
;
algt
=
crypto_get_attr_type
(
tb
);
if
(
IS_ERR
(
algt
))
return
PTR_ERR
(
algt
);
switch
(
algt
->
type
&
algt
->
mask
&
CRYPTO_ALG_TYPE_MASK
) {
case
CRYPTO_ALG_TYPE_BLKCIPHER
:
return
cryptd_create_blkcipher
(
tmpl
,
tb
,
&
queue
);
case
CRYPTO_ALG_TYPE_DIGEST
:
return
cryptd_create_hash
(
tmpl
,
tb
,
&
queue
);
case
CRYPTO_ALG_TYPE_AEAD
:
return
cryptd_create_aead
(
tmpl
,
tb
,
&
queue
);
}
return
-
EINVAL
;
}
static
void
cryptd_free
(
struct
crypto_instance
*
inst
)
{
struct
cryptd_instance_ctx
*
ctx
=
crypto_instance_ctx
(
inst
);
struct
hashd_instance_ctx
*
hctx
=
crypto_instance_ctx
(
inst
);
struct
aead_instance_ctx
*
aead_ctx
=
crypto_instance_ctx
(
inst
);
switch
(
inst
->
alg
.
cra_flags
&
CRYPTO_ALG_TYPE_MASK
) {
case
CRYPTO_ALG_TYPE_AHASH
:
crypto_drop_shash
(
&
hctx
->
spawn
);
kfree
(
ahash_instance
(
inst
));
return
;
case
CRYPTO_ALG_TYPE_AEAD
:
crypto_drop_spawn
(
&
aead_ctx
->
aead_spawn
.
base
);
kfree
(
inst
);
return
;
default
:
crypto_drop_spawn
(
&
ctx
->
spawn
);
kfree
(
inst
);
}
}
static
struct
crypto_template
cryptd_tmpl
=
{
.
name
=
"cryptd"
,
.
create
=
cryptd_create
,
.
free
=
cryptd_free
,
.
module
=
THIS_MODULE
,
};
struct
cryptd_ablkcipher
*
cryptd_alloc_ablkcipher
(
const
char
*
alg_name
,
u32
type
,
u32
mask
)
{
char
cryptd_alg_name
[
CRYPTO_MAX_ALG_NAME
];
struct
crypto_tfm
*
tfm
;
if
(
snprintf
(
cryptd_alg_name
,
CRYPTO_MAX_ALG_NAME
,
"cryptd(%s)"
,
alg_name
) >=
CRYPTO_MAX_ALG_NAME
)
return
ERR_PTR
(
-
EINVAL
);
type
&= ~(
CRYPTO_ALG_TYPE_MASK
|
CRYPTO_ALG_GENIV
);
type
|=
CRYPTO_ALG_TYPE_BLKCIPHER
;
mask
&= ~
CRYPTO_ALG_TYPE_MASK
;
mask
|= (
CRYPTO_ALG_GENIV
|
CRYPTO_ALG_TYPE_BLKCIPHER_MASK
);
tfm
=
crypto_alloc_base
(
cryptd_alg_name
,
type
,
mask
);
if
(
IS_ERR
(
tfm
))
return
ERR_CAST
(
tfm
);
if
(
tfm
->
__crt_alg
->
cra_module
!=
THIS_MODULE
) {
crypto_free_tfm
(
tfm
);
return
ERR_PTR
(
-
EINVAL
);
}
return
__cryptd_ablkcipher_cast
(
__crypto_ablkcipher_cast
(
tfm
));
}
EXPORT_SYMBOL_GPL
(
cryptd_alloc_ablkcipher
);
struct
crypto_blkcipher
*
cryptd_ablkcipher_child
(
struct
cryptd_ablkcipher
*
tfm
)
{
struct
cryptd_blkcipher_ctx
*
ctx
=
crypto_ablkcipher_ctx
(
&
tfm
->
base
);
return
ctx
->
child
;
}
EXPORT_SYMBOL_GPL
(
cryptd_ablkcipher_child
);
void
cryptd_free_ablkcipher
(
struct
cryptd_ablkcipher
*
tfm
)
{
crypto_free_ablkcipher
(
&
tfm
->
base
);
}
EXPORT_SYMBOL_GPL
(
cryptd_free_ablkcipher
);
struct
cryptd_ahash
*
cryptd_alloc_ahash
(
const
char
*
alg_name
,
u32
type
,
u32
mask
)
{
char
cryptd_alg_name
[
CRYPTO_MAX_ALG_NAME
];
struct
crypto_ahash
*
tfm
;
if
(
snprintf
(
cryptd_alg_name
,
CRYPTO_MAX_ALG_NAME
,
"cryptd(%s)"
,
alg_name
) >=
CRYPTO_MAX_ALG_NAME
)
return
ERR_PTR
(
-
EINVAL
);
tfm
=
crypto_alloc_ahash
(
cryptd_alg_name
,
type
,
mask
);
if
(
IS_ERR
(
tfm
))
return
ERR_CAST
(
tfm
);
if
(
tfm
->
base
.
__crt_alg
->
cra_module
!=
THIS_MODULE
) {
crypto_free_ahash
(
tfm
);
return
ERR_PTR
(
-
EINVAL
);
}
return
__cryptd_ahash_cast
(
tfm
);
}
EXPORT_SYMBOL_GPL
(
cryptd_alloc_ahash
);
struct
crypto_shash
*
cryptd_ahash_child
(
struct
cryptd_ahash
*
tfm
)
{
struct
cryptd_hash_ctx
*
ctx
=
crypto_ahash_ctx
(
&
tfm
->
base
);
return
ctx
->
child
;
}
EXPORT_SYMBOL_GPL
(
cryptd_ahash_child
);
struct
shash_desc
*
cryptd_shash_desc
(
struct
ahash_request
*
req
)
{
struct
cryptd_hash_request_ctx
*
rctx
=
ahash_request_ctx
(
req
);
return
&
rctx
->
desc
;
}
EXPORT_SYMBOL_GPL
(
cryptd_shash_desc
);
void
cryptd_free_ahash
(
struct
cryptd_ahash
*
tfm
)
{
crypto_free_ahash
(
&
tfm
->
base
);
}
EXPORT_SYMBOL_GPL
(
cryptd_free_ahash
);
struct
cryptd_aead
*
cryptd_alloc_aead
(
const
char
*
alg_name
,
u32
type
,
u32
mask
)
{
char
cryptd_alg_name
[
CRYPTO_MAX_ALG_NAME
];
struct
crypto_aead
*
tfm
;
if
(
snprintf
(
cryptd_alg_name
,
CRYPTO_MAX_ALG_NAME
,
"cryptd(%s)"
,
alg_name
) >=
CRYPTO_MAX_ALG_NAME
)
return
ERR_PTR
(
-
EINVAL
);
tfm
=
crypto_alloc_aead
(
cryptd_alg_name
,
type
,
mask
);
if
(
IS_ERR
(
tfm
))
return
ERR_CAST
(
tfm
);
if
(
tfm
->
base
.
__crt_alg
->
cra_module
!=
THIS_MODULE
) {
crypto_free_aead
(
tfm
);
return
ERR_PTR
(
-
EINVAL
);
}
return
__cryptd_aead_cast
(
tfm
);
}
EXPORT_SYMBOL_GPL
(
cryptd_alloc_aead
);
struct
crypto_aead
*
cryptd_aead_child
(
struct
cryptd_aead
*
tfm
)
{
struct
cryptd_aead_ctx
*
ctx
;
ctx
=
crypto_aead_ctx
(
&
tfm
->
base
);
return
ctx
->
child
;
}
EXPORT_SYMBOL_GPL
(
cryptd_aead_child
);
void
cryptd_free_aead
(
struct
cryptd_aead
*
tfm
)
{
crypto_free_aead
(
&
tfm
->
base
);
}
EXPORT_SYMBOL_GPL
(
cryptd_free_aead
);
static
int
__init
cryptd_init
(
void
)
{
int
err
;
err
=
cryptd_init_queue
(
&
queue
,
CRYPTD_MAX_CPU_QLEN
);
if
(
err
)
return
err
;
err
=
crypto_register_template
(
&
cryptd_tmpl
);
if
(
err
)
cryptd_fini_queue
(
&
queue
);
return
err
;
}
static
void
__exit
cryptd_exit
(
void
)
{
cryptd_fini_queue
(
&
queue
);
crypto_unregister_template
(
&
cryptd_tmpl
);
}
subsys_initcall
(
cryptd_init
);
module_exit
(
cryptd_exit
);
MODULE_LICENSE
(
"GPL"
);
MODULE_DESCRIPTION
(
"Software async crypto daemon"
);
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